You seem to be grasping at arguments that were not even brought up, but since you brought it up, people regretting transition is not common, sources I could find say it's between 0.5% and 4%. and half of those detransitions are caused by either being nonbinary or the social stigma of transitioning,
https://whatweknow.inequality.cornell.edu/topics/lgbt-equality/what-does-the-scholarly-research-say-about-the-well-being-of-transgender-people/
But so you're not confused I'll summarize the image because you very clearly didn't look at it. in some places trans people are denied all healthcare (Not just gender affirming care, ALL healthcare) which would count as genocide. there are arguments happening on the rights of gay couples being able to adopt, which is as close to preventing births within the group as you can get, which would count as genocide. and taking trans children from their parents for letting them transition is as direct as it gets, it IS genocide. and again refer to the source above for the rate of detransitioning because I know you're gonna say "Transitioning your kid is child abuse"